Electronics and Communication Engineering (ECE) Exam > Electronics and Communication Engineering (ECE) Questions > An amplifier has three stages for which Te1= ...
Start Learning for Free
An amplifier has three stages for which Te1 = 200 K (first stage), Te2 = 450 K, and Te3 = 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?
- a)10
- b)13
- c)16
- d)19
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
An amplifier has three stages for which Te1= 200 K (first stage), Te2 ...
Most Upvoted Answer
An amplifier has three stages for which Te1= 200 K (first stage), Te2 ...
Given:
- Te1 = 200 K
- Te2 = 450 K
- Te3 = 1000 K
- Power gain of second stage (G2) = 5
- Effective input noise temperature (Te) = 250 K
To find:
- Gain of first stage (G1)
Solution:
1. Total effective noise temperature (Tet) of the amplifier:
- Tet = Te1 + (Te2-Te1)/G2 + (Te3-Te2)/(G1*G2)
- Tet = 200 + (450-200)/5 + (1000-450)/(G1*5)
- Tet = 200 + 50 + (550/G1)
2. Equate Tet to Te and solve for G1:
- 250 = 200 + 50 + (550/G1)
- 550/G1 = 250 - 250
- G1 = 550/(-250)
- G1 = -2.2 (This is not a possible value for gain)
3. The above result is not possible because gain cannot be negative. This means that our assumption that G2 = 5 is incorrect. We need to find the actual value of G2 that will result in a positive value for G1.
4. Rearrange the equation for Tet and solve for G2:
- Tet = 200 + (Te2-Te1)/G2 + (Te3-Te2)/(G1*G2)
- G2 = (Te2-Te1)/(Tet-200-(Te3-Te2)/(G1))
- G2 = (450-200)/(250-200-(1000-450)/(G1))
- G2 = 5
5. Now that we have confirmed that G2 = 5, we can solve for G1:
- Tet = 200 + (Te2-Te1)/G2 + (Te3-Te2)/(G1*G2)
- 250 = 200 + (450-200)/5 + (1000-450)/(G1*5)
- G1 = 13
Therefore, the gain of the first stage (G1) must be 13 to guarantee an effective input noise temperature of 250 K.
- Te1 = 200 K
- Te2 = 450 K
- Te3 = 1000 K
- Power gain of second stage (G2) = 5
- Effective input noise temperature (Te) = 250 K
To find:
- Gain of first stage (G1)
Solution:
1. Total effective noise temperature (Tet) of the amplifier:
- Tet = Te1 + (Te2-Te1)/G2 + (Te3-Te2)/(G1*G2)
- Tet = 200 + (450-200)/5 + (1000-450)/(G1*5)
- Tet = 200 + 50 + (550/G1)
2. Equate Tet to Te and solve for G1:
- 250 = 200 + 50 + (550/G1)
- 550/G1 = 250 - 250
- G1 = 550/(-250)
- G1 = -2.2 (This is not a possible value for gain)
3. The above result is not possible because gain cannot be negative. This means that our assumption that G2 = 5 is incorrect. We need to find the actual value of G2 that will result in a positive value for G1.
4. Rearrange the equation for Tet and solve for G2:
- Tet = 200 + (Te2-Te1)/G2 + (Te3-Te2)/(G1*G2)
- G2 = (Te2-Te1)/(Tet-200-(Te3-Te2)/(G1))
- G2 = (450-200)/(250-200-(1000-450)/(G1))
- G2 = 5
5. Now that we have confirmed that G2 = 5, we can solve for G1:
- Tet = 200 + (Te2-Te1)/G2 + (Te3-Te2)/(G1*G2)
- 250 = 200 + (450-200)/5 + (1000-450)/(G1*5)
- G1 = 13
Therefore, the gain of the first stage (G1) must be 13 to guarantee an effective input noise temperature of 250 K.
Attention Electronics and Communication Engineering (ECE) Students!
To make sure you are not studying endlessly, EduRev has designed Electronics and Communication Engineering (ECE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electronics and Communication Engineering (ECE).
|
Explore Courses for Electronics and Communication Engineering (ECE) exam
|
|
Similar Electronics and Communication Engineering (ECE) Doubts
Top Courses for Electronics and Communication Engineering (ECE)View all
An amplifier has three stages for which Te1= 200 K (first stage), Te2 = 450 K, and Te3= 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?a)10b)13c)16d)19Correct answer is option 'B'. Can you explain this answer?
Question Description
An amplifier has three stages for which Te1= 200 K (first stage), Te2 = 450 K, and Te3= 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?a)10b)13c)16d)19Correct answer is option 'B'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about An amplifier has three stages for which Te1= 200 K (first stage), Te2 = 450 K, and Te3= 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?a)10b)13c)16d)19Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An amplifier has three stages for which Te1= 200 K (first stage), Te2 = 450 K, and Te3= 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?a)10b)13c)16d)19Correct answer is option 'B'. Can you explain this answer?.
An amplifier has three stages for which Te1= 200 K (first stage), Te2 = 450 K, and Te3= 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?a)10b)13c)16d)19Correct answer is option 'B'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about An amplifier has three stages for which Te1= 200 K (first stage), Te2 = 450 K, and Te3= 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?a)10b)13c)16d)19Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An amplifier has three stages for which Te1= 200 K (first stage), Te2 = 450 K, and Te3= 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?a)10b)13c)16d)19Correct answer is option 'B'. Can you explain this answer?.
Solutions for An amplifier has three stages for which Te1= 200 K (first stage), Te2 = 450 K, and Te3= 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?a)10b)13c)16d)19Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electronics and Communication Engineering (ECE).
Download more important topics, notes, lectures and mock test series for Electronics and Communication Engineering (ECE) Exam by signing up for free.
Here you can find the meaning of An amplifier has three stages for which Te1= 200 K (first stage), Te2 = 450 K, and Te3= 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?a)10b)13c)16d)19Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
An amplifier has three stages for which Te1= 200 K (first stage), Te2 = 450 K, and Te3= 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?a)10b)13c)16d)19Correct answer is option 'B'. Can you explain this answer?, a detailed solution for An amplifier has three stages for which Te1= 200 K (first stage), Te2 = 450 K, and Te3= 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?a)10b)13c)16d)19Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of An amplifier has three stages for which Te1= 200 K (first stage), Te2 = 450 K, and Te3= 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?a)10b)13c)16d)19Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice An amplifier has three stages for which Te1= 200 K (first stage), Te2 = 450 K, and Te3= 1000K (last stage). If the available power gain of the second stage is 5, what gain must the first stage have to guarantee an effective input noise temperature of 250 K ?a)10b)13c)16d)19Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice Electronics and Communication Engineering (ECE) tests.
|
|
Explore Courses for Electronics and Communication Engineering (ECE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
x
![]()
For Your Perfect Score in Electronics and Communication Engineering (ECE)
The Best you need at One Place
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup